package com.supplychain.financial.parent.common.file;

import java.io.*;

public class FileOperation {  
   
	 /** 
	  * 创建文件 
	  * @param fileName 
	  * @return 
	  */  
	public static boolean createFile(File fileName)throws Exception{  
		boolean flag=false;  
		try{  
			if(!fileName.exists()){  
				fileName.createNewFile();  
				flag=true;  
			}  
		}catch(Exception e){  
			e.printStackTrace();  
		}  
		return true;  
	}   
   
	 /** 
	  * 读TXT文件内容 
	  * @param fileName 
	  * @return 
	  */  
 	public static String readTxtFile(File fileName)throws Exception{  
 		String result=null;  
 		FileReader fileReader=null;  
 		BufferedReader bufferedReader=null;  
 		try{  
 			fileReader=new FileReader(fileName);  
 			bufferedReader=new BufferedReader(fileReader);  
 			try{  
 				String read=null;  
 				while((read=bufferedReader.readLine())!=null){  
 					result=result+read+"\r\n";  
 				}  
 			}catch(Exception e){  
 				e.printStackTrace();  
 			}  
 		}catch(Exception e){  
 			e.printStackTrace();  
 		}finally{  
 			if(bufferedReader!=null){  
 				bufferedReader.close();  
 			}  
 			if(fileReader!=null){  
 				fileReader.close();  
 			}  
 		}  
 		System.out.println("读取出来的文件内容是："+"\r\n"+result);  
 		return result;  
 	}  
   
   
 	public static boolean writeTxtFile(String content,File  fileName)throws Exception{  
 		RandomAccessFile mm=null;  
 		boolean flag=false;  
 		FileOutputStream o=null;  
 		try {  
 			o = new FileOutputStream(fileName);  
 			o.write(content.getBytes("GBK"));  
 			o.close();  
//   		mm=new RandomAccessFile(fileName,"rw");  
//   		mm.writeBytes(content);  
 			flag=true;  
 		} catch (Exception e) {  
 			// TODO: handle exception  
 			e.printStackTrace();  
 		}finally{  
 			if(mm!=null){  
 				mm.close();  
 			}  
 		}  
 		return flag;  
 	}  
  
  
  
 	public static void contentToTxt(String filePath, String content) {  
        String str = new String(); //原有txt内容  
        String s1 = new String();//内容更新  
        try {  
            File f = new File(filePath);  
            if (f.exists()) {  
            } else {  
                f.createNewFile();// 不存在则创建  
            }  
            BufferedReader input = new BufferedReader(new FileReader(f));  
  
            while ((str = input.readLine()) != null) {  
                s1 += str + "\r\n";  
            }
            input.close();  
            s1 += content;  
            BufferedWriter output = new BufferedWriter(new FileWriter(f));  
            output.write(s1); 
            output.write("\r\n");
            output.close();  
        } catch (Exception e) {  
            e.printStackTrace();  
  
        }  
    }  
  
} 